US369297A - Elevator - Google Patents

Description

(No Model.)

0. G. OTIS.

ELEVATOR. N0. 369,297. Patented Aug. 30, 1887. Yxgi. T'lgk G a f i 4 a I Y :1 i I fl U z 65:; 1W 7 I 6 f% n I W '10 4 WITNESSES: l/VVE/VTOR 611mm: oi xe i q 5ZW ATTORNEYS N nuns. Phnlml ihagnphdr, Washington. ac.

UNITED STATES PATENT Price.

CHARLES G. OTIS, OF BROOKLYN, NEW YORK.

ELEV

Aron.

SPECIFICATION forming part of Letters Patent No. 369,297, dated August 30, 1887.

Application filed December 31, 1886. Serial No, 223,108. (No model.)

To aZZ 2071-0111, it nmy concern:

Be it known that l, CHARLES G. OTIS, a oiti' zen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented new and useful Improvements in Elevators, of which the following is a speciiication.

This invention relates to elevators; and it consists in a device for starting and stopping the elevator, the novel features of which are fully pointed out in the specification and clai ms, and illustrated in the drawings, in which-- Figure 1 shows an elevator constructed ac cording to my invention. Fig. 2 is a sectional view of a portion of the air-compressor. Fig. 3 is a section of a four-way cock. Fig. 4 is a modification of my device.

Similar letters indicate corresponding parts.

The elevator which I have represented in the drawings is operated by hydraulic pressure; but I do not wish to confine myself to hydraulic elevators, since my invention can be applied to all elevators"which are operated by a liquid or fluid under pressure.

In the drawings, the letter A designates a car of an ordinary elevator suspended from a rope, B, which. passes over the stationary sheave O and under the traveling sheave D, and is then firmly secured to the cross-beam E. The traveling sheave D is attached to the piston-rod of a hydraulic motor, F, so that when the latter moves up or down the traveling sheave D will move with it and cause the lowering or raising of the car A,the latter being guided in its course by guide-posts G.

His a valve which controls the passage of the water or fluid to and from the motor F, so that by operating said valve the car A can be raised or lowered, or brought to a stop at any point in its course. This valve H is usually operated by means of a hand-rope, which is connected to the valve by suitable gearing, and which extends through the car and through its whole course,so that the elevator attendant is enabled to operate the valve H by pulling said rope in the proper direction.

The object of my invention is to dispense with the hand-ropes and operate the valve H from the interior of the car by means of compressed air.

To the bottom of the car A, I secure an airpump,l,of any convenient construction. This air-pump may consist of a cylinder,a,in which is fitted a piston, I), provided with openings 0, which are covered by flap-valves (Larranged to admit air to the cylinder when the piston moves down. This air-pump is connected to an air receiver or reservoir, J, by means of openings 6, which are closed by flap-valves f, the arrangement of all these valves and openings being such as to admit the air forced into the receiver by the action of the pump,but to prevent its escape. The air-pump is operated by the car preferably as the latter moves in a downward direction. For this purpose a piston-rod, f, is attached to the under side of the piston 12, so that it projects beyond the lower edge of the cylinder at when the piston is in its lower position. (See Fig. 1.) As the car approaches it-slowest position, the piston-rod will strike the ground at g, and as the downward motion of the car continues the piston will be forced up into the cylinder, thereby compressing the air which has entered the cylinder through the openings in the piston and forcing the sameinto the receiver J From this receiver extends a pipe, it, provided with a cook or valve, K, Figs. 1 and 3, which can be operated by a handle, Z, in the interior of the car, and by means of which the compressed air from the receiver J can be admitted to the valveoperating device L. This valve-operating device may be' constructed in any convenient manner-for instance, as shown in the drawings, where it consists of a cylinder, *5, in which is fitted a piston, j, which is connected by means of a piston-rod, It, with the valve H.

The shell or chamber of the valve K eonnccts with the opposite ends of the cylinder i by means of pipes N P and M O, the sections N and M of which are made flexible, so that they can follow the movements of the car, and by turning the handle Z in the proper direction the compressed air from the receiver J can be admitted to either end of the cylinder i, and the valve H can be changed.

The body of the cock or valve K is provided with four passages, (see Fig. 3,) one of which, in, is connected with the airrecciver J, two, a o, with the flexible pipes M N, and one, 1), opens into the atmosphere.

Q, is the plug, provided with two passages, q and r. If this plug is turned to the position shown in full lines in Fig. 3, the compressed air from the receiver J will enter the passage m and pass into the pipes N and P and under the piston j in the cylinder i, so as to force the same upward, permitting the air in front of this piston to pass out of the cylinder t through the pipes M and O, and through the passages n a" 19 into the atmosphere.

If the plug Q is turned to the position shown in dotted lines in Fig. 3, the compressed air from the receiver J enters the cylinder 1' through the pipe M 0 above the piston j, and the air contained in this cylinder beneath the piston j is free to escape through the pipesP, N, and p. In order to stop the elevator-car at any point of its course, the plug Q is turned to the position indicated by dots and strokes in Fig. 3.

When it is desired to replenish the receiver J before the car reaches its lowest position, I may employ the device illustrated in Fig. 4. In this figure I attach a cross-head, s, to the piston-rod f, which carries two weighted levers, t, pivoted at a, which engage two stops, '0, pivoted to the guide-posts G. As the car descends, the levers t strike the stops 1;, so as to arrest the motion of the cross-head s and the piston b, and to compress the air in the cylinder it until the pressure therein is greater than that represented by the weighted levers it, when the continued downward motion of the car causes these levers to assume the position shown in dotted lines in Fig. 4 until they have passed the stops 1;, when they will drop back to their normal position against the projections 10, extending from t the cross-head. The stops 1) are pivoted to permit the levers t to pass as the car goes up.

It is obvious that the air-compressor could also be similarly operated by the upward motion of the car, but this is less desirable, as it would add to the load of the elevator, while if the air-eompressor is operated as above first described the weight of the car and the ropes What I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with the car of an elevator and the valve H, for controlling the motion of the car, of the valve K, arranged within the car and controllable by an attendant, and an air-compressor comprising a cylinder and reciprocating piston carried by the car and operated by the movement thereof, said valve in the car serving to adjust the controlling-valve H-at will by compressed air, substantially as herein described.

2. The combination, with an elevator-car and with the valve H, for controlling the motion of said car, of the valve K, arranged in the car and controlled by an attendant, the air-compressor I, carried by the car and operated by the movement thereof, the air-receiver .T, the air-cylinder t, the pipes M O N P, leading from the valve K to the cylinder 1', and

the piston j, made to work in said cylinder and to connect with the valve H, for operating said valve at will from the interior of the car by compressed air, substantially as described.

3. The combination, with an elevator-car and with the valve H, for controlling the motion of said car, of the valve K, arranged in the car and controlled by an attendant, the air-compressor I, carried by the car and operated by the movement thereof, the weighted levers it, connected to the piston of the aircompressor I, the stops 0, and connections, substantially as herein described, between the valve K and the valve H.

- 4. The combination, with an elevatorcar and with the valve H, for controlling the motion of said car, of the valve K, the air-compressor I, carried by the car, the air-receiver J, the air-cylinder z, tli'e pipesM O N 1?, leading from the valve K to the cylinder 6, the piston j, made to work in said cylinder and to connect with the valve H, the weighted levers t, connected to the piston of the air-compressor, and the stops asubstantially as sh own and described.

In testimony whereof I have hereunto set my hand and seal in the presence of two subscribing witnesses.

E. F. KASTENHUBER, \V. HAUFF.

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